Rollerblade's Hydrogen Wheels are the pinnacle of performance. The 80mm wheels are ideal for getting around town or campus. The Hydrogen Wheels deliver power and response with more grip to keep your steady and longevity for greater use. The urethane is a great vibration reducer which means less fatigue and more performance for longer stretches. The core of the Rollerblade Hydrogen Wheels are designed in a way to give you more flex, power and energy with each stride. These premium wheels will allow you to swerve around pedestrians and get to class well before the bell rings so you can kick back and finish up your homework.